From the author of

From the author of

Copying Nodes

You can use the <xsl:copy> element to copy nodes, specifying just
what parts you want to copy. The default rule for elements is that only the
text in the element is copied. However, you can change that with <xsl:copy>,
which can copy whole elements, text nodes, attributes, processing instructions
and more, as you direct.

Heres an example; in this case, Ill strip all comments, processing
instructions, and attributes out of planets.xml, simply by copying only text
and elements: